Fence-post mold.



No. 784.667. PATENTED MAR. 14, 1905. J. B. ENGSTROM.

FENCE POST MOLD.

APPLIOATION FILED OUT. 28. 1904.

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.K /.5 I dig 4 No. 784,667 PATENTED MAR. 14, 1905. J. B. ENGSTROM.

FENCE POST MOLD; APPLIQATION FILED OCT. 28. 19 04.

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awvwwoz attomwq UNITED STATES Patented March 14, 1905.

PATENT OEEIcE.

FENCE-POST NI OLD.

SPECIFICATION forming part of Letters Patent N 0. 784,667, dated March14;, 1905. Application filed October 28, 1904. Serial No. 230,419.

To (0% whom it may concern:

Be it known that I, JACOB B. ENGSTROM, a citizen of the United States,residing at Manchester, in the county of Delaware and State of Iowa,have invented certain new and useful Improvements in Fence-Post Molds;and Ido declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates toiniprovements in fence-post molds.

The object of the invention is to provide a mold in which fence-postsmay be cast or formed from any suitable plastic material, means beingprovided whereby said material may be firmly tamped into the mold andmeans whereby the completed post may be quickly and easily removed fromthe mold.

With the above and other objects in view the invention consists ofcertain novel features of construction, combination, and arrangement ofparts, as will be hereinafter more fully described, and particularlypointed out in the appended claims.

In the accompanying drawings, Figure -1 is a side elevation of the mold,showing the plunger in elevated position. Fig. 2 is a verticallongitudinal sectional view showing the plunger in lowered position anda post formed in the mold. Fig. 3 is a side view showing the parts in aposition for removing a completed post. Fig. l is a transverse verticalsectional view on a line 4 4 of Fig. 1. Fig. 5 is a similar view on aline 5 5 of Fig. 3; and Fig. 6 is an end elevation of the machine,showing in full lines the parts in position for forming a post and indotted lines the position of the parts for the removal of a post.

Referring more particularly to the drawings, 1 denotes uprights orstandards which are connected together near their lower ends by means ofa longitudinally-disposed bar 2, upon which is supported, by means ofincline pivot-arms 3, a substantially triangularlyshaped trough 4, whichforms one section of the mold. The trough 4 consists of a bottom sectionor strip 5, to one edge of which is rigidly secured an inclined board 6,forming one of the sides of the mold, and on the other end of saidbottom edge is arranged an inclined board 7, which boards are supportedin position by means of V-shaped brace-bars 8. To the brace-bars 8 aresecured the upper ends of pivotedarms 3.

On the upper ends of the standards 1 is arranged a plunger-carryingframe 9, said frame being hingedly connected to said standards by meansof plates or bars 10, fixed on the ends of the frame and pivotallyconnected at their lower ends to the standards 1, so that when saidframe is in an upright position the same will rest upon the upper endsof the standards 1 and when swung laterally thereon will be supported bysaid straps or bars 10. The lateral movement of said bars 10 and frame 9is limited by means of a stop-pin 12. The frame 9 is here shown asformed of vertically-disposed upright bars 13, which are connected neartheir upper ends by a crossbar let. On the inner sides of the uprightbars 13 are slidably mounted plunger-carrying blocks 15, which areconnected by a plunger-bar 16. On one edge of each block 15 is arrangeda vertically-disposed rack-bar 17, with which are adapted to mesh spurgearpinions 18. The pinions 18 are fixed upon a longitudinally-disposedshaft19, which is journaled in suitable bearings 20, secured to theadjacent edges of the upright bars 13. On one end of the shaft 19 isarranged a crank-handle 21, whereby said shaft may be revolved to causesaid pinions to engage the teeth of said rackbars, thus raising andlowering the plunger-blocks 15 and plunger 16. On the inner face of thestandards 1 and upright bars 13 are arranged guide-rods 22 and 23,whereby said plunger-blocks are guided and held in position. On theupper side of the plunger-bar 16 is arranged a longitudinally-disposedweight, which extends from oneend of said bar to the other, whereby anequal pressure will be exerted by the plunger when the same is engagedwith the post. On the under side of the plunger is arranged a rib 24 anda longitudinally-disposed series of downwardly-projecting pins 25. \Vhensaid plunger is brought into engagen'ient with the post 111 the moldsaid pins are forced through the same and through guide openings 26,

formed in the bottom strip 5 of the moldtrough. The openings thus formedin the post by the pins serve to permit the line-wires of the fence tobe passed through the post.

In forming a post the parts are brought to the position shown in Fig. 1of the drawings, wherein the plunger has been raised to its highestposition, after which the mold-trough is filled with cement or otherplastic material After that the plunger is allowed to descend upon theplastic mass within said trough. thereby pressing the same into a firmcompact form, said plunger being successively raised and dropped uponsaid mass, thus tamping and packing the same evenly throughout theentire length of the trough. After the post thus formed has begun to setthe plunger is raised by means of the crank-shaft, as hereinbeforedescribed, until the same has reached the limit of its upward movement,after which the frame 9 is swung laterally upon the standards 1 to theposition shown in Figs. 3 and 5 of the drawings, in which position thesame will be entirely clear of the mold-trough, thereby permitting thesame to be swung to one side upon the pivotal connections of the arms 3and into engagement with the supporting cross-bars 27. The bars 27 arearranged upon the connectingbar 2 of the standards I, by which saidtrough will be supported while the post is being removed from thetrough, which is readily accomplished by lifting the side board 7, whichnow forms the bottom supporting-board of the post. Said board is readilyremoved from the supporting brace-bars 8, and on said board the post isallowed to remain until lirmly hardened and set, another board beingarranged upon the brace-boards 8 in place of the one removed, afterwhich the trough is swung back to its operative position. The trough4 isheld in an operative position by means of a hook 28, which is pivotallymounted upon the upper end of a bar 29 and is adapted to be hooked intoengagement with a pin 30 arranged on the upper edge of the side board 6of the trough, said side board being adapted to engage the bar 29, whichforms a support for this side of the trough. To the side board (3 of thetrough may be also secured handbars 31, whereby the trough may be morereadily upset to permit the movement of a finished post therefrom.

As hereinbeforc stated, the parts of the mold are preferably so arrangedand constructed to form a substantially triangular-shaped post, saidparts being also shaped to form a tapering post, whereby the base of thesame will be coi'isiderably larger than the upper end. It will beobvious that by forming the parts of the mold in a different shape andarranging the same in other positions various-shaped posts may be formedby the machine.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes n the form, proportion,

and the minor details of construction may be resorted to withoutdeparting from the principle or sacrificing any of the advantages ofthis invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a mold of the character described, the combination with asupporting-frame, of a mold-trough hingedly connected thereto, one sideof said trough being adapted to be removed, a tamping-plunger arrangedabove said trough, guide-rods on said plunger,1neans whereby saidplunger is raised and lowered, and means whereby the same may be swunglaterally to clear said trough, substantially as described.

2. In a mold of the character described, the combination with asupporting-frame, of a mold-trough arranged thereon, means whereby saidtrough may be swung to a horizontal position on said frame, meanswhereby one of the side boards of the trough is detachably supported topermit the same to be lifted from the trough thus facilitating theremoval of a finished post, a plLinger-supporting frame ar ranged aboveand hingedly connected to said standards, a tamping-plunger slidablymounted in said frame, and means whereby said plunger is raised andlowered, substantially as described.

3. In a mold of the character described, the combination with asupporting-frame, of a mold -trou'gh arranged therein, supportingarmsconnected at their upper ends to said trough and hingedly connected attheir lower ends to said frame, \l-shaped brace-bars connected to one ofthe side boards of said trough and adapted to removably support theother side board, a plunger-frame arranged above and hingedly connectedto said standards, a tampingplunger slidably mounted in said frame,guide-rods arranged on said frames to guide said plunger in itsmovement, and means whereby said plunger is raised and lowered,substantially as described.

4. In a mold of the character described, the combination with asupportingframe, of a mold-trough arranged therein, supporting armsconnected at their upper ends to said trough and hingedly connected attheir lower ends to said frame, whereby said mold may be tilted to ahorizontal position, means whereby the same is supported in saidhorizontal position, \I-shaped brace-bars connected to one of the sideboards of the mold and adapted to removably support the other sideboard, a weighted plunger-frame hingedly mounted on the upper ends ofsaid standards, a plunger slidably mounted in said frame, pins arrangedon the under side of said plunger to engage holes formed in the bottomof said trough, guide-rods arranged on said frames, to guide saidplunger in its movements, and means whereby said plunger is raised andlowered, substantially as described.

5. In a mold of the character described, the combination with asupporting-frame, of a mold-trough arranged therein, supportingarmsconnected at their upper ends, to said trough and hingedly connected attheir lower ends to said frame, V-shaped brace-bars connected to one ofthe side boards of said trough and adapted to removably support theother side board, a plunger-frame arranged above and hingedly connectedto said standards, a tampingplunger slidably mounted in said S. R.YOUNG, FRED B. BLAIR.

